Re: [Freetype] How do I render italic or bold if no file

[Riccardo Cohen]

Thanks a lot for the answer.

I'll try that, 

but I am quite sure that MS Word and others dont do that! There must be an 
explanation why Bold is not present and yet proposed in standard font dialog.


Dave Williss wrote:
> 
> I see nobody answered your question yet.
> 
> You can implement synthetic italics by applying a shear angle.  Here's a
> snippet of code that I use to do this (FT1, probably similar for FT2)
> 
> double sintheta = sin(-angle);    // For rotating the glyph.. optional
> double costheta = cos(-angle);
> TT_Matrix mat;
> mat.xx = (TT_Fixed)(costheta * (1<<16));
> mat.xy = (TT_Fixed)(sintheta * (1<<16));
> mat.yx = -mat.xy;
> mat.yy = mat.xx;
> TT_Fixed f = (TT_Fixed)(tan(shear) * (1<<16));    // suggest shear == 10deg
> converted to radians
> mat.xy += TT_MulFix(f, mat.xx);
> mat.yy += TT_MulFix(f, mat.yx);
> TT_SetInstanceTransform_Flags(instance, (angle != 0), (shear != 0));
> 
> If there's no bold variation, I do synthetic bold by blitting the bitmap N
> times, where N is a percentage of the glyph with (but always at least 2).
> Each additional blit is moved over one pixel in a direction dictated by the
> glyph angle (normally one pixel to the right for upright text).  I also
> account for this when doing character placement, as this synthetic bold
> makes each glyph a bit wider.  Of course, for efficiency, this blitting N
> times is only done when loading a glyph into a bitmap glyph cache.  I then
> actually render out of the cache.
> 
> ----- Original Message -----
> From: "Riccardo Cohen" <address@hidden>
> To: <address@hidden>; <address@hidden>
> Sent: Monday, September 09, 2002 5:59 PM
> Subject: [Freetype] How do I render italic or bold if no file
> 
> > Hi,
> > Any idea ?? I re-send my question :
> >
> > There is something I do not understand about ttf files.
> > On my PC (WinNT). When I look in c:\winnt\fonts, I find only one file
> called "chevara" for instance (chvr____.ttf), which is regular (normal). I
> cannot find any chevara bold or italic.
> >
> > But when I open MSWord, or any standard Windows font panel, I can use
> chevara bold, italic and bold-italic. Where did it find it ???
> >
> > I tried to use the index in FT_New_Face but it did not render italic or
> bold... How do they do that miracle ???
> >
> > Is it at render time, or is there any way to extract them from the ttf
> file ?
> >
> > Thanks
> >
> > --
> > Riccardo Cohen
> >
> > Articque
> > Les Roches
> > 37230 Fondettes
> > France
> > email = address@hidden
> > web = http://www.articque.com
> > tel: +33 02 47 49 90 49
> > fax: +33 02 47 49 91 49
> >
> > _______________________________________________
> > Freetype mailing list
> > address@hidden
> > http://www.freetype.org/mailman/listinfo/freetype
> 
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-- 
Riccardo Cohen

Articque
Les Roches
37230 Fondettes
France
email = address@hidden
web = http://www.articque.com
tel: +33 02 47 49 90 49
fax: +33 02 47 49 91 49